The Ice Bucket Challenge has become a viral trend. Every day, at least a dozen major celebrities seem to dump ice over their heads and make headlines. It's easy to forget when you watch, like, R-Pattz do this, that it's all about raising money for ALS, but that fact is very much worth remembering. Amytrophic lateral sclerosis, commonly known as Lou Gehrig's disease, is a devastating condition that causes nerve cells in the brain and spinal cord to degenerate over time, and can lead to paralysis in its latest stages.